Why would you ever want to invert such a useless function?
If it's homework and you're having trouble solving for x in terms of f(x), then there's a good chance the function is not one-to-one and thus has no inverse. The way you would prove this, though, is to find two values, x and y, such that f(x) = f(y). Alternatively, if you can plot the graph of the function, you can use a horizontal line test to see if it's one-to-one. If you can find a horizontal line that passes through two distinct points on the graph, then you can't invert it.
CRGreathouse
Sep22-08, 02:37 PM
Alternatively, if you just want the answer for yourself, you should consider numerical methods instead of analytic solutions.